package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.page.PageMethod;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.*;
import com.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.*;
import java.util.stream.Collectors;

/**
 * @author 山顶洞人郑某
 * @className OrderServiceImpl.java
 * @date 2024 02 12
 */
@Service
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private WebSocketServer webSocketServer;
    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //查询地址是否为空
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        //查询购物车数据
        Long userId = BaseContext.getCurrentUserId();
        List<ShoppingCart> list = shoppingCartMapper.listByuserId(userId);
        if (list == null || list.size() == 0){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //没有异常问题则向订单表中插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orders.setPhone(addressBook.getPhone());
        orders.setAddress(addressBook.getDetail());
        orders.setConsignee(addressBook.getConsignee());
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setUserId(userId);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setPayStatus(Orders.PAID);
        orders.setOrderTime(LocalDateTime.now());
        orderMapper.insert(orders);
        //向订单明细表中插入多条数据
        List<OrderDetail> orderDetailist = new ArrayList<>();
        for (ShoppingCart shoppingCart : list) {
            OrderDetail orderDetail = new OrderDetail(); //订单明细
            BeanUtils.copyProperties(shoppingCart,orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetailist.add(orderDetail);
        }

        orderDetailMapper.insertBatch(orderDetailist);
        //清空购物车数据
        shoppingCartMapper.clean(userId);
        //通过webSocket 向客户端浏览器推送消息 type orderId content
        Map map = new HashMap();
        map.put("type",1);
        map.put("orderId",orders.getId());
        map.put("content","订单号:" +orders.getNumber());
        String s = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(s);
        //封装数据返回给前端
        return OrderSubmitVO.builder()
                .orderTime(orders.getOrderTime())
                .orderAmount(orders.getAmount())
                .id(orders.getId())
                .orderNumber(orders.getNumber()).build();
    }


    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentUserId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal("0.01"), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);

          vo.setPackageStr(jsonObject.getString("package"));

       // OrderPaymentVO vo = new OrderPaymentVO();
        return vo;
    }

    /**
     * 用户端订单分页查询
     * @param ordersPageQueryDTO
     * @return
     */

    @Override
    public PageResult pageByUserId(OrdersPageQueryDTO ordersPageQueryDTO) {
        //PageHelper pageHelper = new PageHelper();
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentUserId());
        Page<Orders> page = orderMapper.page(ordersPageQueryDTO);
        List<OrderVO> list = new ArrayList<>();
        if (page!= null && page.getTotal()>0){
            List<Orders> result = page.getResult();
            for (Orders orders : result) {
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                orderVO.setOrderDetailList(orderDetailMapper.getByOrderId(orders.getId()));
                list.add(orderVO);
            }
        }
        PageResult pageResult = new PageResult();
        pageResult.setRecords(list);
        if (page != null) {
            pageResult.setTotal(page.getTotal());
        }
        return pageResult;
    }

    @Override
    public OrderVO getDetails(Long id) {
        Orders orders = orderMapper.getById(id);
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetailMapper.getByOrderId(orders.getId()));
        return orderVO;
    }

    /**
     * 取消订单
     *
     * @param id
     */
    @Override
    public void userCancelById(Long id) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
            weChatPayUtil.refund(
                    ordersDB.getNumber(), //商户订单号
                    ordersDB.getNumber(), //商户退款单号
                    new BigDecimal("0.01"),//退款金额，单位 元
                    new BigDecimal("0.01"));//原订单金额
            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }
        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
    }

    /**
     * 再来一单
     *
     * @param id
     */
    public void repetition(Long id) {
        // 查询当前用户id
        Long userId = BaseContext.getCurrentUserId();
        // 根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();
            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;
        }).collect(Collectors.toList());
        // 将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 订单搜索
     *
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.page(ordersPageQueryDTO);
        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);
        return new PageResult(page.getTotal(), orderVOList);
    }

    /**
     * 各个状态的订单数量统计
     *
     * @return
     */
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);
        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 取消订单
     *
     * @param ordersCancelDTO
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());
        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == 1) {
            //用户已支付，需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal("0.01"),
                    new BigDecimal("0.01"));
            // log.info("申请退款：{}", refund);
        }
        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 接单
     *
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    /**
     * 拒绝接单
     *
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());
        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (Objects.equals(payStatus, Orders.PAID)) {
            //用户已支付，需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal("0.01"),
                    new BigDecimal("0.01"));
           // log.info("申请退款：{}", refund);
        }
        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     *
     * @param id
     */
    @Override
    public void delivery(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        // 校验订单是否存在，并且状态为3
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }

    /**
     * 完成订单
     *
     * @param id
     */
    @Override
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 客户催单
     *
     * @param id
     */
    @Override
    public void reminer(Long id) {
        //根据id查询订单
        Orders orders = orderMapper.getById(id);
        if (orders == null){
            throw  new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        Map map = new HashMap();
        map.put("type",2);//1表示来电提醒 2 表示客户催单
        map.put("content","订单号：" + orders.getId());
        //通过webSocket向客户端发送消息
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

    /**
     * 查询订单管理数据
     *
     * @return
     */
    @Override
    public OrderOverViewVO getOverviewOrders() {
        OrderOverViewVO orderOverViewVO = new OrderOverViewVO();
        orderOverViewVO.setAllOrders(orderMapper.getOrderCountByStatus(null));
        orderOverViewVO.setCompletedOrders(orderMapper.getOrderCountByStatus(Orders.COMPLETED));
        orderOverViewVO.setCancelledOrders(orderMapper.getOrderCountByStatus(Orders.CANCELLED));
        orderOverViewVO.setDeliveredOrders(orderMapper.getOrderCountByStatus(Orders.CONFIRMED));
        orderOverViewVO.setWaitingOrders(orderMapper.getOrderCountByStatus(Orders.TO_BE_CONFIRMED));
        return orderOverViewVO;
    }

    /**
     * 查询订单完成率
     *
     * @return
     */
    @Override
    public Double getOrderCompletionRate() {
        HashMap<String ,Object> map = new HashMap<>();
        map.put("begin",LocalDateTime.of(LocalDate.now(),LocalTime.MIN));
        Integer orders = orderMapper.countBymap(map);
        map.put("status",Orders.COMPLETED);
        Integer comOrder = orderMapper.countBymap(map);
        if (orders == 0 ){
            return 0.0;
        }
        return comOrder.doubleValue()/orders;
    }

    /**
     * 获取营业额
     *
     * @return
     */
    @Override
    public Double getTurnover() {
       return orderMapper.getAmount(LocalDateTime.of(LocalDate.now(),LocalTime.MIN));
    }

    /**
     * 获取平均客单价
     *
     * @return
     */
    @Override
    public Double getUnitPrice() {

        return null;
    }


    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();
        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);
                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }
    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());
        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }


}
